Overclock.net › Forums › Intel › Intel CPUs › disable PLL and CPU spread spectrum?
New Posts  All Forums:Forum Nav:

disable PLL and CPU spread spectrum?

post #1 of 6
Thread Starter 
i read that these can cause instability issues by addint voltage and should be disabled when OC'ing

do you disable these JUST when OC'ing or disable them perm if you OC
Edited by eosgreen - 6/20/11 at 5:17pm
Almost done...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500K 4.6ghz P67 Sabertooth Asus 560 ti 4g Dominator Ram w/EKBlock 
Hard DriveOptical DriveOSMonitor
Corsair 120g force 3 ssd - Caviar Black WD 500g Asus Windows 7 21.5 Inch 1920/1080 
PowerCaseMouseMouse Pad
Corsair AX850w M8 Spawn Qck 
  hide details  
Reply
Almost done...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500K 4.6ghz P67 Sabertooth Asus 560 ti 4g Dominator Ram w/EKBlock 
Hard DriveOptical DriveOSMonitor
Corsair 120g force 3 ssd - Caviar Black WD 500g Asus Windows 7 21.5 Inch 1920/1080 
PowerCaseMouseMouse Pad
Corsair AX850w M8 Spawn Qck 
  hide details  
Reply
post #2 of 6
I'm not too sure about intel chips, but cpu spread spectrum in AMD chips help stability (in some cases) by adding a little extra voltage when needed. Obviously, you don't need to use it, but sometimes it does help. Personally I turn it off if I'm trying to get my max OC though.
post #3 of 6
PLL overvolt is not needed in most sandy chips until 4.8+ multipliers, the higher you can go without needing it, the better.
Air 540
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570k @4.8ghz MSI z77 MPower  MSI GTX 780 Lightning Sli 8GB Corsair Vengeance White  
Hard DriveHard DriveCoolingOS
Intel 520 Series 120GB WD Caviar Black 1TB NZXT Havik 140 W7-Home Edition x64bit 
MonitorKeyboardPowerCase
ASUS 23.5@ 1920x1080 120hz Logitech G110 Black USB Wired LED Backlit Corsair AX 750 Corsair Air 540 
MouseMouse Pad
Logitech G700  GIGABYTE GP-MP8000 Extreme Accuracy Gaming Pad 
  hide details  
Reply
Air 540
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570k @4.8ghz MSI z77 MPower  MSI GTX 780 Lightning Sli 8GB Corsair Vengeance White  
Hard DriveHard DriveCoolingOS
Intel 520 Series 120GB WD Caviar Black 1TB NZXT Havik 140 W7-Home Edition x64bit 
MonitorKeyboardPowerCase
ASUS 23.5@ 1920x1080 120hz Logitech G110 Black USB Wired LED Backlit Corsair AX 750 Corsair Air 540 
MouseMouse Pad
Logitech G700  GIGABYTE GP-MP8000 Extreme Accuracy Gaming Pad 
  hide details  
Reply
post #4 of 6
Quote:
Originally Posted by sockpirate;13943814 
PLL overvolt is not needed in most sandy chips until 4.8+ multipliers, the higher you can go without needing it, the better.

that is actually incorrect, no one really knows what it's for. I found through testing, that when enabled I actually couldn't boot into windows with it with a 55x multiplier, however, once disabled I was able to boot into windows with a 55x multiplier. This pretty much defies the whole propsed aspect of being only enabled when requiring a set amount of multiplier in this case 48x.

So for me I usually have it enabled and disable spread spectrum to eliminate fluctuations of the core speed under load.
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
post #5 of 6
Ahh i see , i will take your word for it muna! I just know that was common knowledge about disabling it when the chips were first released, although they (Asus) did make the statement that it wont necessarily stabilize an unstable clock. Not sure if that makes any sense to you , with all the tinkering you have done with your i5?

I know i cannot boot into windows if PLL Overvolt is not enabled at my x48 and above.
Air 540
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570k @4.8ghz MSI z77 MPower  MSI GTX 780 Lightning Sli 8GB Corsair Vengeance White  
Hard DriveHard DriveCoolingOS
Intel 520 Series 120GB WD Caviar Black 1TB NZXT Havik 140 W7-Home Edition x64bit 
MonitorKeyboardPowerCase
ASUS 23.5@ 1920x1080 120hz Logitech G110 Black USB Wired LED Backlit Corsair AX 750 Corsair Air 540 
MouseMouse Pad
Logitech G700  GIGABYTE GP-MP8000 Extreme Accuracy Gaming Pad 
  hide details  
Reply
Air 540
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570k @4.8ghz MSI z77 MPower  MSI GTX 780 Lightning Sli 8GB Corsair Vengeance White  
Hard DriveHard DriveCoolingOS
Intel 520 Series 120GB WD Caviar Black 1TB NZXT Havik 140 W7-Home Edition x64bit 
MonitorKeyboardPowerCase
ASUS 23.5@ 1920x1080 120hz Logitech G110 Black USB Wired LED Backlit Corsair AX 750 Corsair Air 540 
MouseMouse Pad
Logitech G700  GIGABYTE GP-MP8000 Extreme Accuracy Gaming Pad 
  hide details  
Reply
post #6 of 6
It works differently for everyone. I need pll overvoltage @ 4.5ghz to lower my vcore to around 1.35v if i disable pll overvoltage i need 1.39v just to boot into windows, i have tried every other voltage combination and pll solves my issues.
Chewy's Chomper
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k Asis Z170 Deluxe MSI GTX 1080 Gaming x 16GB Corsair vengence DDR4 3200 
Hard DriveCoolingOSMonitor
Samsung M2 256gb nvme Custom loop, 360+120 rads Windows 10 64bit Asus 28" MG28UQ 4K 
PowerCase
Seasonic X series 750w gold Corsair 400c 
  hide details  
Reply
Chewy's Chomper
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k Asis Z170 Deluxe MSI GTX 1080 Gaming x 16GB Corsair vengence DDR4 3200 
Hard DriveCoolingOSMonitor
Samsung M2 256gb nvme Custom loop, 360+120 rads Windows 10 64bit Asus 28" MG28UQ 4K 
PowerCase
Seasonic X series 750w gold Corsair 400c 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › disable PLL and CPU spread spectrum?